Include your answer to this question in your memo.

A $30$ ft tall dam is being designed that contains two vertical concrete dam sections on

either side of an earth dam section, as shown below.

Not to scale

A borrow source is located nearby with an in$-$place gm $=115$ pcf at a natural water

content of $12\%.$ The specifications for the earth dam require that the borrow soil be

compacted to gd $=120$ pcf at a water content of $10\%.$

$($a$)$ What volume of borrow soil is required to build the earth dam as it is shown in the

drawings above?

$($b$)$ Suppose the borrow soil is fine$-$grained $($CL for instance$).$ What type of compactor

would you recommend be used to compact this soil?

$($c$)$ What is the vertical stress increase at the top of the former ground surface below the

centerline of the levee? $2.$ Application to earth structures. Include your answer to this question in your memo.

A $30$ ft tall dam is being designed that contains two vertical concrete dam sections on either side of an earth dam section, as shown below.

Not to scale

A borrow source is located nearby with an in$-$place $\backslash (\backslash$gamma$\_\{\backslash$mathrm$\{$m$\}\}=115\backslash$mathrm$\{$pcf$\}\backslash )$ at a natural water content of $\backslash (12\backslash \%\backslash ).$ The specifications for the earth dam require that the borrow soil be compacted to $\backslash (\backslash$gamma$\_\{\backslash$mathrm$\{$d$\}\}=120\backslash$mathrm$\{$pcf$\}\backslash )$ at a water content of $\backslash (10\backslash \%\backslash ).$

$($a$)$ What volume of borrow soil is required to build the earth dam as it is shown in the drawings above?

$($b$)$ Suppose the borrow soil is fine$-$grained $($CL for instance$).$ What type of compactor would you recommend be used to compact this soil?

$($c$)$ What is the vertical stress increase at the top of the former ground surface below the centerline of the levee?